B1B8E
B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 140
Theory of Operation
When powered, the Occupant Restraint Controller (ORC) sends a test current to the seat track position sensors to verify the integrity of the sensor
and wiring. The use of the SRS Load Tool Adapter Tool in the tests below provides a test point in place of the module.
- When Monitored:
While the CAN bus ignition status is in IGN_RUN and the module is configured for a Driver Seat Track Position Sensor, the module checks
the sensor input current ranges.
- Set Condition:
If the module detects that the sensor input is greater than or equal to 20.5 mA. This DTC may set when the current is between 17 mA and 20.5
mA.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 141
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Restraints and Safety Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview/Restraints System Pre-Diagnostic Procedure.
1. IDENTIFYING VEHICLE EQUIPMENT
NOTE: Make sure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read ORC active DTCs.
Does the scan tool display active DTC: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . See: Restraints and Safety Systems/Testing and Inspection/Initial
Inspection and Diagnostic Overview/Restraints System Intermittent Condition Test
2. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT RESTRAINT
CONTROLLER (ORC)
1. With the scan tool, read Occupant Restraint Controller (ORC) DTCs.
Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?
Yes
- Diagnose and repair the DTCs. See: .
No
- Go To 3
3. INSPECT DRIVER SEAT HARNESS WIRES AND CONNECTORS
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Using the wiring diagram/schematic as a guide, inspect the driver seat harness wiring and connectors. Look for chafed, pierced, pinched, or
partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
Are any of these conditions present?
Yes
- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the
Seat Harness.
- Replace the driver seat harness.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- Go To 4
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 142
4. VERIFY THAT DRIVER SEAT HARNESS IS ROUTED CORRECTLY
1. Verify that the driver seat harness is routed correctly.
Is the Driver Seat Harness routed correctly?
Yes
- Go To 5
No
- Reroute the driver seat harness as necessary.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
5. CHECK FOR DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH WITH DRIVER SEAT TRACK
POSITION SENSOR DISCONNECTED
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Disconnect the Driver Seat Track Position Sensor connector.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
2. Wait two minutes, and then with the scan tool, read ORC DTCs.
Does the scan tool display: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?
Yes
- Go To 6
No
- WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
- Replace the Driver Seat Track Position Sensor.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
6. CHECK (Z261) DRIVE SEAT POSITION SENSOR GROUND CIRCUIT AND (R263) DRIVE SEAT POSITION SENSOR VOLTAGE
CIRCUIT FOR A SHORT TO VOLTAGE
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Disconnect the ORC connectors.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 143
2. Measure the voltage of the (Z261) Driver Seat Position Sensor Ground circuit at the Driver Seat Track Position Sensor connector cavity 1.
3. Measure the voltage of the (R263) Driver Seat Position Sensor Voltage circuit at the Driver Seat Track Position Sensor connector cavity 2.
Is the voltage above 0.2 of a volt on either circuit?
Yes
- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the
Seat Harness.
- WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
- Replace the Driver Seat Harness.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- Go To 7
7. CHECK (Z261) DRIVER SEAT POSITION SENSOR GROUND CIRCUIT FOR A SHORT TO (R263) DRIVER SEAT POSITION
SENSOR VOLTAGE CIRCUIT
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Measure the resistance between the (Z261) Driver Seat Position Sensor Ground circuit cavity 1 and the (R263) Driver Seat Position Sensor
Voltage circuit cavity 2 in the Driver Seat Track Position Sensor connector.
Is the resistance below 10k Ohms?
Yes
- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the
Seat Harness.
- Replace the Driver Seat Harness.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- Replace the ORC.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 140
Theory of Operation
When powered, the Occupant Restraint Controller (ORC) sends a test current to the seat track position sensors to verify the integrity of the sensor
and wiring. The use of the SRS Load Tool Adapter Tool in the tests below provides a test point in place of the module.
- When Monitored:
While the CAN bus ignition status is in IGN_RUN and the module is configured for a Driver Seat Track Position Sensor, the module checks
the sensor input current ranges.
- Set Condition:
If the module detects that the sensor input is greater than or equal to 20.5 mA. This DTC may set when the current is between 17 mA and 20.5
mA.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 141
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Restraints and Safety Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview/Restraints System Pre-Diagnostic Procedure.
1. IDENTIFYING VEHICLE EQUIPMENT
NOTE: Make sure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read ORC active DTCs.
Does the scan tool display active DTC: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?
Yes
- Go To 2
No
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. . See: Restraints and Safety Systems/Testing and Inspection/Initial
Inspection and Diagnostic Overview/Restraints System Intermittent Condition Test
2. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT RESTRAINT
CONTROLLER (ORC)
1. With the scan tool, read Occupant Restraint Controller (ORC) DTCs.
Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?
Yes
- Diagnose and repair the DTCs. See: .
No
- Go To 3
3. INSPECT DRIVER SEAT HARNESS WIRES AND CONNECTORS
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Using the wiring diagram/schematic as a guide, inspect the driver seat harness wiring and connectors. Look for chafed, pierced, pinched, or
partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
Are any of these conditions present?
Yes
- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the
Seat Harness.
- Replace the driver seat harness.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- Go To 4
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 142
4. VERIFY THAT DRIVER SEAT HARNESS IS ROUTED CORRECTLY
1. Verify that the driver seat harness is routed correctly.
Is the Driver Seat Harness routed correctly?
Yes
- Go To 5
No
- Reroute the driver seat harness as necessary.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
5. CHECK FOR DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH WITH DRIVER SEAT TRACK
POSITION SENSOR DISCONNECTED
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Disconnect the Driver Seat Track Position Sensor connector.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
2. Wait two minutes, and then with the scan tool, read ORC DTCs.
Does the scan tool display: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?
Yes
- Go To 6
No
- WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
- Replace the Driver Seat Track Position Sensor.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
6. CHECK (Z261) DRIVE SEAT POSITION SENSOR GROUND CIRCUIT AND (R263) DRIVE SEAT POSITION SENSOR VOLTAGE
CIRCUIT FOR A SHORT TO VOLTAGE
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Disconnect the ORC connectors.
WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
2010 Jeep Truck Grand Cherokee SRT-8 V8-6.1L Page 143
2. Measure the voltage of the (Z261) Driver Seat Position Sensor Ground circuit at the Driver Seat Track Position Sensor connector cavity 1.
3. Measure the voltage of the (R263) Driver Seat Position Sensor Voltage circuit at the Driver Seat Track Position Sensor connector cavity 2.
Is the voltage above 0.2 of a volt on either circuit?
Yes
- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the
Seat Harness.
- WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
- Replace the Driver Seat Harness.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- Go To 7
7. CHECK (Z261) DRIVER SEAT POSITION SENSOR GROUND CIRCUIT FOR A SHORT TO (R263) DRIVER SEAT POSITION
SENSOR VOLTAGE CIRCUIT
WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these
instructions may result in possible serious or fatal injury.
1. Measure the resistance between the (Z261) Driver Seat Position Sensor Ground circuit cavity 1 and the (R263) Driver Seat Position Sensor
Voltage circuit cavity 2 in the Driver Seat Track Position Sensor connector.
Is the resistance below 10k Ohms?
Yes
- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the
Seat Harness.
- Replace the Driver Seat Harness.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
No
- Replace the ORC.
- Perform the ORC VERIFICATION TEST. See: Verification Tests/Occupant Restraint Controller (ORC) Verification Test.
